H:\My Documents\Arduino\libraries\Charlieplex\Charlieplex.cpp: In member function 'void Charlieplex::start(int)':H:\My Documents\Arduino\libraries\Charlieplex\Charlieplex.cpp:60: error: 'Timer1' was not declared in this scopeH:\My Documents\Arduino\libraries\Charlieplex\Charlieplex.cpp: In member function 'void Charlieplex::stop()':H:\My Documents\Arduino\libraries\Charlieplex\Charlieplex.cpp:67: error: 'Timer1' was not declared in this scope